|Rank|Nation|Gold|Silver|Bronze|Total|
|---|---|---|---|---|---|
|1|Puerto Rico|17|27|13|57|
|2|Bahamas|17|15|19|51|
|3|México|9|9|5|23|
|4|Jamaica|8|6|4|18|
|5|Barbados|7|3|6|16|
|6|Trinidad and Tobago|7|2|2|11|
|7|Venezuela|3|3|8|14|
|8|Colombia|3|1|2|6|
|9|U.S. Virgin Islands|1|1|3|5|
|10|Martinique|1|1|0|2|
|11|Antigua and Barbuda|1|0|1|2|
|12|Suriname|1|0|0|1|
|13|Bermuda|0|4|2|6|
|14|Dominican Republic|0|2|4|6|
|15|Panamá|0|1|2|3|
|16|Cayman Islands|0|0|2|2|
|16|Saint Kitts and Nevis|0|0|2|2|

Question: how many countries earned only one gold medal?
Answer: 4